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Discussion in 'Troubleshooting & Diagnosis' started by Justin79maro, Dec 22, 2017.
Is that hose ok?
Yeah it seems to be fine. But when I unplug is the idle doesn't change and it's always been like that where is doesn't have any vacuum at idle. Do you think the vacuum Adv is going out?
If you have full time vacuum on that line, it should change the idle speed. If you have ported vacuum, it might not change at all until engine rpms come up.
It is fairly easy to check the vacuum advance. Put a hand vacuum pump on the line to the distributor. Pull the distributor cap so you can see inside the distributor. Pump up the vacuum and see if the advance moves in the distributor.
So I've cleaned the discharge nozzle. Check the fuel filter, replaced the vacuum Adv. And it still has the stumble and power loss between 1500-2000rpm. Not really sure what to try next. I guess I'll pull the carb apart and clean it unless anyone who has had this problem can tell me what it is lol
Find a way to block the secondaries so they can't open. Then drive it again.
If you can't block them closed, tighten the secondary adjustment so it opens later and give it a try.
Adjust the pump arm. You could also have a loose power valve.
Did you check the choke to see if its opening and
Staying open? It has 12 volts?
I'm curious if the spark plug gap may be too wide.
I pulled the front bowl off and check the power valve and I changed the jets from 72s to 69s and the tears from 83s to 79s
Yes it stays open and it has a 12v source to it